EP0007771B1 - Drahtabisolierwerkzeug - Google Patents

Drahtabisolierwerkzeug Download PDF

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Publication number
EP0007771B1
EP0007771B1 EP79301422A EP79301422A EP0007771B1 EP 0007771 B1 EP0007771 B1 EP 0007771B1 EP 79301422 A EP79301422 A EP 79301422A EP 79301422 A EP79301422 A EP 79301422A EP 0007771 B1 EP0007771 B1 EP 0007771B1
Authority
EP
European Patent Office
Prior art keywords
jaws
drawbar
jaw
handle
stripping tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79301422A
Other languages
English (en)
French (fr)
Other versions
EP0007771A1 (de
Inventor
Zdzislaw Bieganski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0007771A1 publication Critical patent/EP0007771A1/de
Application granted granted Critical
Publication of EP0007771B1 publication Critical patent/EP0007771B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
    • H02G1/1202—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by cutting and withdrawing insulation
    • H02G1/1204—Hand-held tools
    • H02G1/1207—Hand-held tools the cutting element not rotating about the wire or cable
    • H02G1/1209—Hand-held tools the cutting element not rotating about the wire or cable making a transverse cut
    • H02G1/1212—Hand-held tools the cutting element not rotating about the wire or cable making a transverse cut using wire or cable clamping means

Definitions

  • This invention relates to wire stripping tools used for removing or displacing a portion of the sheath or covering from a wire core, for example in preparing an insulated electrical conductor for connection.
  • British Patent No. 1110935 discloses a range of wire stripping tools comprising a pair of outer jaws for gripping the sheath or covering, a pair of inner jaws located between the outer jaws for cutting into the sheath or covering, and a pair of handles which can be closed together so as to first close both pairs of jaws and then displace the inner jaws relative to the outer jaws, so as to move the cut portion of the sheath along the core.
  • the cut into the sheath need not be completed in that the displacing movement can tear the sheath so as to achieve a like effect.
  • a lever handle closes the jaws and the inner cutting jaws are displaced for the stripping by a rod or drawbar.
  • the handle is connected to both the jaw and the drawbar by a whole system of links forming two sets of toggle linkages acting respectively between the handle and jaw, and between the handle and drawbar. This is complex to make and assemble and the geometry is critical.
  • the problem with wire stripping tools of this kind is to produce a simple design capable of economical manufacture and which can cope with a range of different cables and the like, which may differ from one another in terms of overall thickness, core thickness, and sheath hardness.
  • the object of the present invention is to provide an improved tool for these purposes.
  • a wire stripping tool comprises a pair of outer jaws for gripping a cable, at least one of the outer jaws being pivotally mounted on a relatively stationary part, a pair of inner jaws for cutting the sheath of the cable, a lever handle for closing the jaws, a drawbar connected to the inner jaws, a spring resisting movement of the drawbar, and at least one link pivoted to the handle and to the drawbar for displacing the inner jaws relative to the outer jaws, and is characterised in that the pivot of said at least one outer jaw is between the ends of the jaw, and that an end of the jaw is pivoted to the end of the lever handle, handle closing movement causing jaw closing whilst drawbar movement is resisted by spring pressure and when jaw closing ceases due to resistance of the cable, the spring deflecting to allow drawbar displacement by the handle via the said link.
  • the tool shown in the drawing comprises a pair of outer jaws 10 for gripping the sheath or covering of a cable, and a pair of lever handles 12.
  • the handles are pivotally connected to the jaws by pins 14 which also serve to fulcrum first links 16, these links 16 being pivoted at their other ends upon pins 18 to a cursor 20.
  • the outer jaws 10 are also pivoted on pins 22 which pass through a relatively stationary part in the form of a pair of mounting plates or common member which lie in parallel planes and extend from the vicinity of the pins 22'to surround pin 24.
  • a pair of cutting jaws 26 is located between the gripping jaws 10, and these jaws are spring- urged apart by a small compression spring 28, the cutting jaws being pivoted together on pin 30 which also couples the inner jaws 26 to a drawbar 32.
  • the cursor 20 is a slide fit on the drawbar, and a second pair of links 34 is pivotally connected to the drawbar pins 36, the outer ends of these links 34 being pivotally connected to the lever handles 12 by further pins 38.
  • the drawbar is formed at the end opposite to pin 30 with a cutting edge 40, and this is arranged to slide past the second cutting edge 42 formed on a cutter plate held in position by pin 24.
  • the drawbar is conveniently formed with a pair of elongated and co-axial slots 44, 46 and a respective limit pin 48, 50 extends through each of these and also through the said metal frame plates.
  • the pin 50 serves as an end abutment for a helically wound compression spring 54, the opposite end of which uses the second links 34 as an end abutment, so that this spring tends to drive the drawbar and hence the cutting jaws 26 to the illustrated position relative to the length of the gripping jaws 10.
  • the pin 48 in addition to guiding the drawbar for linear displacement (as later described) also serves to provide a limit stop for movement of the cursor 20 towards the jaws.
  • the cable to be treated is placed between the jaws generally in the position indicated by the chain dot line 60 and then the levers 12 are closed towards one another.
  • the initial movement of the lever handles 12 is to pivot them about the pins 38 so that the pins 14 separate, and take the pivotally coupled ends of the jaws 10 further apart, and because the jaws 10 are pivoted on the pins 22, this closes the gripping jaws upon the cable 60.
  • the pins 18 move the cursor towards the jaws until the movement is terminated either by the resistance of the cable 60 preventing the jaws being closed further or by the cursor 20 contacting the limit pin 48.
  • the cutting jaws 26 penetrate into the sheath.
  • the end of the drawbar provided with the cutting edge 40 runs in a generally tubular housing 62 having a lateral slot 64, so that a wire can be cut to length before stripped by being inserted in the slot 64 and the lever handles moved together so that the cutting edges 40, 42 move in scissor fashion to snip the cable.
  • one of the jaws 10 is made integrally with the associated lever handle 12 and the corresponding links 16 and 34 are omitted.
  • This unitary part may be made fast with the sleeve 62, and the operation then is exactly the same as described, except that the total closing movement possible for the jaws is only half of what would be the case with the illustrated tool. Such a tool is therefore useful for a narrower range of cable sizes.
  • the range of sheath to core ratios which can be treated satisfactorily can be increased by providing a screw adjuster effective to displace one of the cutting jaws 26- relative to its gripping jaw 10 so that the projection of the cutting edge 66 relative to the gripping face 68 can be varied.

Landscapes

  • Knives (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)

Claims (5)

1. Drahtabisolierwerkzeug, enthaltend ein Paar äußerer Backen (10) zum Ergreifen eines Kabels, wobei wenigstens ein der äußeren Backen schwenkbar an einem relativ stationären Teil angeordnet ist, ein Paar innerer Backen (26) zum Schneiden des Kabelmanteis, einen Hebelgriff (12) zum Schließen der Backen, eine mit den inneren Backen verbundene Zugstange, eine der Bewegung der Zugstange entgegenwirkende Feder (54) sowie wenigstens ein Verbindungsglied (34), das an den Griff (bei 38) und an die Zugstange (32, bei 36) angelenkt ist, für eine Verlagerung der inneren Backen relative zu den äußeren Backen, dadurch gekennzeichnet, daß die Schwenkachse der genannten einen äußeren Backe (10) sich zwischen den Enden der Backe befindet und daß ein Ende der Backe schwenkbar am Ende des Hebelgriffes (am Zapfen 14) angeordnet ist, wobei eine Griffschließbewegung ein Schließen der Backe bewirkt, während einer Zugstangenbewegung durch den Federdruck entgegengewirkt wird, und wobei, wenn das Schließen der Backen aufgrund des Kabelwiderstandes aufhört, die Feder abgelenkt wird, wodurch die Zugstange durch den Griff über das genannte Verbindungsglied (34) verlagerbar ist.
2. Drahtabisolierwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß nur eine Greifbacke (10)-wie zuvor erwähnt-schwenkbar verbunden ist, während die andere einstückig und einheitlich mit einem Hebelgriff (12) ausgeführt ist.
3. Drahtabisolierwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß beide äußeren Backen (10) schwenkbar mit zugehörigen Hebelgriffen (12) und beide Hebelgriffe schwenkbar mit Verbindungsgliedern (34) verbunden sind, die mit der Zugstange in Verbindung stehen.
4. Drahtabisolierwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß ein weiteres Verbindungsglied (16) an einem Ende mit der Schwenkverbindung (14) zwischen der Backe und dem Hebelgriff und am anderen Ende mit einem Schieber (20) verbunden ist, der so angeordnet ist, daß eine anfängliche Schließbewegung des schwenkbaren Griffes den Schieber in Richtung auf die Backen verlagert und den Abstand zwischen der Schwenkverbindung des Hebelgriffes und der Backe von der Zugstange vergrößert.
5. Drahtabisolierwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß die Zugstange mit einer Schneidkante (40) versehen ist, die so angeordnet ist, daß sie bei einer Zugstangen-Verlagerung über eine zweite Schneidkante (42) hinaus verlagerbar ist.
EP79301422A 1978-07-27 1979-07-17 Drahtabisolierwerkzeug Expired EP0007771B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3142078 1978-07-27
GB7831420 1978-07-27

Publications (2)

Publication Number Publication Date
EP0007771A1 EP0007771A1 (de) 1980-02-06
EP0007771B1 true EP0007771B1 (de) 1982-09-22

Family

ID=10498719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301422A Expired EP0007771B1 (de) 1978-07-27 1979-07-17 Drahtabisolierwerkzeug

Country Status (6)

Country Link
US (1) US4329891A (de)
EP (1) EP0007771B1 (de)
JP (1) JPS55500570A (de)
DE (1) DE2963728D1 (de)
PL (1) PL217412A1 (de)
WO (1) WO1980000392A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638692A (en) * 1985-08-26 1987-01-27 The Boeing Company Wire stripper with double wedge spring loaded gripper
US4970779A (en) * 1989-09-19 1990-11-20 Chen Ing Wen Remover for IC chips
GB2294162B (en) * 1994-10-12 1998-03-11 Courtney Ross Cirencester Ltd Stripping tools
US5745943A (en) * 1996-11-21 1998-05-05 Bagley; Wendell W. Cable stripping and bending device
GB2330108A (en) * 1997-10-10 1999-04-14 Z B Tools Ltd Wire stripping or crimping tool with cam adjuster
US7360472B2 (en) * 2003-10-09 2008-04-22 Franz Krampe Automatic wire stripper
DE202005008034U1 (de) * 2005-05-18 2006-09-28 Weidmüller Interface GmbH & Co. KG Werkzeug zum Abmanteln eines Kabels
DE102017128228A1 (de) * 2017-11-29 2019-05-29 Rennsteig Werkzeuge Gmbh Abisolierzange
DE102017128226A1 (de) 2017-11-29 2019-05-29 Rennsteig Werkzeuge Gmbh Abisolierzange
DE102017128227A1 (de) 2017-11-29 2019-05-29 Rennsteig Werkzeuge Gmbh Klemmbacken und Schneiden für eine Abisolierzange, sowie Abisolierzange

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1151319A (en) * 1915-06-22 1915-08-24 Stuart G Wood Insulated-wire-stripping device.
DE1059064B (de) * 1956-12-19 1959-06-11 Andreas Zerenner Abisolierzange
US3146645A (en) * 1961-08-07 1964-09-01 Ideal Ind Straight line wire stripper
GB1110935A (en) * 1964-12-17 1968-04-24 Zdzislaw Bieganski Tools for stripping covered wire
US3763723A (en) * 1970-10-07 1973-10-09 Ideal Ind Wire stripper
DE2402187C3 (de) * 1974-01-17 1980-02-07 C. A. Weidmueller Kg, 4930 Detmold Handzange zum Abisolieren von Leiterenden
GB1564199A (en) * 1975-11-11 1980-04-02 Weidmueller Kg C Tools for stripping sheating from cables and the like
US4116092A (en) * 1977-06-13 1978-09-26 Ashtabula Development Co. Device for stripping insulation from a wire

Also Published As

Publication number Publication date
PL217412A1 (de) 1980-08-25
JPS55500570A (de) 1980-08-28
DE2963728D1 (en) 1982-11-04
EP0007771A1 (de) 1980-02-06
US4329891A (en) 1982-05-18
WO1980000392A1 (en) 1980-03-06

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